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300 SAUM load advice.

 
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  #1  
Old 10-28-2006, 05:51 PM
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Location: Kentucky
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300 SAUM load advice.

Could y'all please help me with some load information for my new rifle. I just traded for a Sendero 300 SAUM, and know nothing about the cartridge. I looked back 40 pages and could not find any load advice.
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RidgeRooster
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  #2  
Old 10-28-2006, 07:48 PM
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Re: 300 SAUM load advice.

Not trying to endorse this site,but you'll find more of what your looking for here.

http://www.netrifle.com/forum1/default.asp?CAT_ID=13
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Old 10-28-2006, 08:03 PM
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Re: 300 SAUM load advice.

Tell me what kind of bullets you want to shoot, and I'll hook you up with all the loads that work in my two 300 RSAUMs or shoot me an email sewwhat89 @ yahoo.com.
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Old 10-28-2006, 08:57 PM
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Re: 300 SAUM load advice.

sewwhat, Ive also have a sendero 300 saum I just got back from Kirby.Im planning on trying the 180 and 200 MKs.The chamber was throated deeper so the 180 doesnt have to be seated past the bottom of the neck,its also closer to a minimum spec chamber.
Any recommendations for these?
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  #5  
Old 10-29-2006, 06:07 AM
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Re: 300 SAUM load advice.

sewwhat89, I would like to work up a load for 180 grain bullets either BT's, Scirocco's, SST's. I am not apposed to going heavier or lighter. This rifle will mainly be used here in KY for whitetail, and we are also planning on a praire goat hunt next Aug. where I may need to ring it out a bit.
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RidgeRooster
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  #6  
Old 10-29-2006, 09:51 AM
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Re: 300 SAUM load advice.

I have had horrible luck with the 190 SMKs, because of the seating depth issue (that's what I blamed it on). Varget has been the best powder in both of mine for bullets 175 grs and lighter. I shoot the 185 gr Berger VLDs instead of the SMKs for their better bc and because I can load them in my factory chamber into the lands with the top of the BT at the shoulder/neck junction. They just work perfectly. I went up to 64 gr H4350, but pressures got a bit iffy. The load I settled in on is 60 gr of H4350 with the 185 gr Berger VLDs. That gets me 2900 fps with them. I shoot the 175 gr SMKs with 53.5 gr Varget or the 178 gr AMAX with 54 grs Varget which net 2880-2920 for the SMKs and 2820-2860 for the AMAX, depending on the ambient temps. From my hunting nook across a creek bottom to another ridgeline about 400 yards away, the SMKs print about 4" higher.

I played with primers to tighten up the groups with the 185s. I tried BR2s, WLR, RP9.5M, GM210M and WLRM primers. Personally, I have always had the best groups and usually velocity with the RP9.5M primers.

Its my opinion, but I think they are the idea primers for about 60 gr of powder. On the average of all my rifles, BR2s work the best under powder charges of about 38-45 grs, WLR are in the 50-60 range, RP9.5Ms seem to take over up to around 75 grs where WLRM and 215s take over. To throw some mud into this, my 300WM shoots 81gr H1000 and 175 gr SMKs into 0.5" groups at 200m with the BR2s. When I tried the RP9.5Ms, groups opened to 1". 'Hotter' primers made things worse and put me into pressure signs.

On the 200 SMKs, I think H4350 will still be your best bet. You should be able to hold 2800 fps with them or better since you have a min-spec chamber. FWIW, my factory chamber is pretty dang close to min-spec best I can measure. Best of luck! I am interested to see what you are able to work up.
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Old 10-29-2006, 09:58 AM
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Re: 300 SAUM load advice.

For the 180s, you are in a transition zone for me. I can get very close performance with both Varget and H4350 in the 180 class bullet. I switch gears between 175 gr SMKs with Varget to H4350 with 185 gr Berger VLDs. For the goats, you may want to consider playing with some of the Bergers. They would work out great on them.

60gr H4350 185 Berger VLD RP9.5M
54gr Varget 178 AMAX RP9.5M

I have not shot any 180s in my rifles except the factory loaded NPs which shot at 3220 fps out of my Sendero. That tops what my 300 WM can do with my best handloads. All I know, when handloaders get their hands on what RP is dumping in their shortmags . . . it will be a glorious day! During breakin, I put 9 rounds of 165gr CoreLokts into a 0.790" hole (0.482 ctc) launching at an average velocity of 34xx fps. I can only dream of getting my hands on that powder and load data!
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